Title bar won't hide in fullscreen on specific monitor if not marked as 'Main Display'

I cannot get the title bar to hide on specific monitor, if it isn't the 'Main Display' on my PC. Another monitor works if it is not the main display. I have tried f11, alt-enter, but it always appears windowed on the display. If I mark the display as the 'Main Display' it instantly begins to work. I cannot use this as my main display in my setup and would like to fix this if possible.